Which of the following types of firewalls ensures that the packets are part of the established session?
Which of the following types of firewalls ensures that the packets are part of the established session?
A stateful inspection firewall ensures that packets are part of an established session by maintaining a table of active connections and allowing only packets that correspond to these active sessions. This type of firewall monitors the full state of active connections and makes sure that packets are part of a valid session before allowing them through, distinguishing it from other types of firewalls like circuit-level, application-level, and switch-level firewalls.
Based on CE-Council, this is a definition of Circuit level FW: Circuit-Level Gateway Firewall A circuit-level gateway firewall works at the session layer of the OSI model or transport layer of TCP/IP. It forwards data between networks without verification and blocks incoming packets from the host but allows the traffic to pass through itself. Information passed to remote computers through a circuit-level gateway will appear to have originated from the gateway, as the incoming traffic carries the IP address of the proxy (circuit-level gateway). Such firewalls monitor requests to create sessions and determine if those sessions will be allowed. Basicaly Statefull FW do the same what Circuit level FW and more. Therfore both answers are good